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madisoncole0416 madisoncole0416
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6 years ago
Which of the following statements regarding code requirements of HVAC systems is MOST accurate?
 
  A. Fire dampers are optional.
  B. Internal duct smoke detection devices are required.
  C. They rarely require a smoke damper that is actuated by a smoke detector.
  D. They require furnaces under a certain size to be enclosed with fire-rated construction
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